信息系统安全性的维护周期与耗费成本

Maintenance cycle and expenses cost of information system security

提出信息系统安全性概率降低趋势的马尔柯夫模型,并对随安全性概率降低的耗费增量函数进行了描述和分析,综合得出了维护成本与维护周期的定量关系,进而推导出系统检测维护的最佳周期。

This issue builds a Markov model of security probability’s decreasing trend,and describes and analyzes the incremental cost function,at last,deduces the quantitative relation between expenses cost and maintenance cycle.It is concluded that the most appropriate maintenance cycle for network information system from the quantitative relationship and the cycle reduce the expenses cost to a minimum.